基本解釋安全手柄詞組短語短語dead -man's handle 安全手柄dead-man's handle更多詞組英英字典柯林斯英英字典 a safety switch on a piece of machinery, such as a train, that allows operation only while depressed by the operator dead-man's handle劍橋字典dead-man's handle柯林斯字典專業(yè)釋義琯理學(xué)自廻位手柄